Air & Space Museum

Smithsonian Institution's National Air and Space Museum (http://www.nasm.si.edu/) has the largest collection of historic air and spacecraft in the world. It has hundreds of artifacts on display including the original Wright 1903 Flyer, the Spirit of St. Louis, the Apollo 11 command module, and a lunar rock sample that visitors can touch.

Magnus and Maliah enjoyed running (crawling in Maliah's case) around and exploring the hands on displays. 

Flying a plane in the wind tunnel